Trying to limit a input type=text only decimal values with 2 digits after decimal

[simpledeveloper]

I am working on an Ember application, I have a following JavaScript Code written to limit the entry of digits after decimal, this function is called in Key-Down event. Its working but what it is doing it, it allowing 3 digits after decimal but when I am posting its value on the Service, that is taking correctly 2 digits after decimal but what it is showing in the Textbox is 3 digits after decimal. And another request if possible is, can I do the same without using id attribute on the Textbox. Any help please, thanks in advance.

allowOnly2Decimals: function (e1, event) {
var boxId = '#' + event.path[0].id;

            if ((event.keyCode == 190) || (event.keyCode == 110)) {
                this.decimalPressed = true;
            }

            if (this.decimalPressed) {
                var t = e1.toString().split('.');

                if (t\[1\] != null) {
                    if (t\[1\].length == 2) {
                        this.limitDecimal = e1;                           
                        $(boxId).val(e1);
                    }

                    if (t\[1\].length >= 2) {
                        e1 = this.limitDecimal;
                        $(boxId).val(e1);

                        return false;
                    }
                }
            }                          
        }

[Richard Deeming]

No need to use Javascript:

<input type="number" scale="0.01" />

Or:

<input type="text" pattern="^\d+(\.\d{0,2})?$" />

---

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[simpledeveloper]

But it didn't work Here is what I have put

${{input type="number" id=p.ViolationTypeId value=p.PenaltyAssessed maxlength="5" scale="0.01" pattern="^\d+(\.\d{0,2})?$" focusOut=(action 'saveTotalPenalty' p model.id p.PenaltyAssessed)}}

I tried both individually and by putting both, still it didn't work, is Ember different, I don't know.